Press for making briquettes



1` 620,621 March 15, 192? H. APFELBECK PnEssEs Fon MAKING BRIQU'ETTES Filed oct. a. 192e Patented Mar. l5, 1927.

UNITED sTTEs HUGO APFELBECK, F FALKENAU, CZECHOSLOVAKIA.

PRESS FOR MAKING BRIQUETTES.

Application led October 8, 1926, Serial No.

A known type of rotary press vfor compressing granular orpowdered material is constituted by a ring within which a compression disc is eccentrically mounted, the

` said disc engaging a groove of the ring. This press has the disadvantage that the length of compressed material to be cut into l riquettes (and hereinafter referred to as the blank) after passing the compression stage adheres to the lateral walls of the annular groove as the material swells, so that certain portions of the blank cannot bd entirely stripped olf as complete single briquettes; in fact the compressed material is scraped out of the annular groove in pieces.

It has been proposed'to avoid this disadvantageby compressing the material between adjacent and oppositely rotating compressing rolls, the compression chamber formed by the space between the rolls being closed laterally by rings bearing on the end faces of the rolls and mounted eccentrically to one ofthe said rolls, these rings having moreover a larger diameter than the rolls. The free portions of these rings, away from the compression zone, move apart from one another so that the blank jammed between these rings by swelling is first detached from the surface of the rolls and subsequently from the diveringly moving rings so that briquettes can be cut from the blank with j the aid of the known strippers. .This type ofpress however also has. certain practical disadvantages.' The blank-conveying rings constituting part of the compression chamber form joints with the walls of the rolls, and since these joints are in the region where the pressure is highest, the material is forced into them, with the result that material is wasted, more power consumed and even the working of the apparatus .may be jeopardize The present invention aims to remove these disadvantages, and it consists essentially in constructing the grooved ring which forms the compression chamber in two annular sections that rotate in synchronsm' owing to a positive connection between them, the inner lateral faces of the sections 5 `forming the lateral walls of the compres- I sion groove, and the floor or bottom of the said groove being formed by a shoulder on one of the said faces-fitting a corresponding recess in the other; or both the said faces may be recessed to receive an intermediate ring forming the said floor. The compres 140,308, and in Germany January 21, 1924.

sion chamber has thus no joints located within the zone of highest Idirect pressure, and the material remains entirely contained in the chamber. Furthermore, in the press according to the invention, the annular sections of the ring are guided in a direction parallel to the axis of rotation of the said ring so that the lateral walls of the compression groove are at the smallest distance apart at the compression zone, the said distance gradually widening from the front and the rear of the said zone as far as the point at which the blank is stripped oft' and cut into briquettes.

Another feature of the invention is to form the blank in the groove in two compression stages. i. e. the material is compressed to a certain extent before it reaches the compression disc. This prevents `the material from heaping up or accumulating just in front of the compression chamber proper, with the result .that the internal resistance of the press is reduced and the briquettes are much more uniform.

A constructional example of the briquetting press according to this invention is illustrated in the accompanying drawings in which Fig. 1 is a side elevation, partially in section;

Fig. 2 is a section along line :1i-m of Figure 1;

Fig. 8 is a portion of a similar section shown on an enlarged scale, and

Fig. 4 is a fragmental section of a slightly modified construction.

With reference to Figures 1, 2 and 3,

the' grooved ring consists of two annular sections 9, 10, the inner face of the rim portion 2O of one having a shoulder 7 while the rim portion 21 of the other section has correspondingly shaped recess forming an accurate lit with the shoulder 7. This constitutes the outer.v closure of a compression groove 2, the lateral walls of which are formed by the lateral inner faces of the annular sections 9, 10. The Hoor or bottom of the groove 2 is formed 'by the inner face of the shoulder 7 of the rim 20, the said face being parallel to the axis of rotation of the ring. The joint 8 between the two annular rims 20 and 21 islaterally shifted from the zone of highest direct pressure so xthat under no circumstances 1s material forced into the said joint.

In the construction shown in Figure 4,

- the ioor of the compression groove.

- both the annular sections 12, 13 are recessed pression disc 3 preliminarily compresses the material fed from a hopper 4 to the groove 2 so that the said material is fed tol die 3 in the shape of a strip or blank 6 which is given its final shape in the region or zone 7 of highest pressure.

The annular sections of the grooved `ring are guided by rollers 16 and 17 disposed at right angles to the lane of the ring so that the inner faces `of t e ring sections form, at the compression zone, a groove the section of which is that of the final blank, the width of the said groove gradually increasing as Vusual both in advance of and behind the said zone towards the point where the briquette is stripped olf, so that the finished blank is kept clear, in the customary way, of the lateral walls of the groove 2. The blank is taken out of the groove with the aid of a stripper 14 and drops into a discharge trough 15.

The guide rollers, or certain of them, can also be used for moving in the usual way the annular sections 9, 10 of the ring apart from one another in front and at the rear of the compression zone towards the point at which the briquette is stripped oif. According vto the invention rollers 16, 17 have lateral anges at their ends between which fits the peripheral portion of the ring. The annular sections of the ring are guided along a predetermined path against the action of the pressure. The roller 16 gives the groove 2 the width of the final blank while the roller 17, which is disposed diametrically opposite the roller 16, has a wedged-shaped collar 18, whereby the faces forming the joint 8 are moved away from one another.

As shown in the rawings, one of the driving rollers 1 may also be shaped as a 'guiding roller, and may comprise two separate parts or members which may be aXlal- `ly adjustable for compensating wear. The

pressure exerted at right angles to the annuilar sections may be taken up also by rollers What I claim'is: v

1. A briquetting press, comprising a rev- -oluble ring embodying two coordinate annular sections arranged face to face'and conjointly providing between the adjacent inner faces of their rim portions an annular compression groove; means for feeding material to the. groove; t,and a rotary compressing disc mounted within and eccentrically ofsaid ring and projecting conformably into said groove, said sections having radial abutment joints which are disposed to one side of the plane of the oove to prevent material from being forced into the joints from said groove during compression.

2. briquettin press, comprising a revoluble ring embo ying two coordinate annular sect-ions arranged face to face and conljointly providing between the adjacent inner faces of thelr rim portions an annular compression groove; means for feeding material to the groove; a rotary compressing disc mounted within and eccentrically of said ring and projecting conformably into saidgroove; and means for automatically moving the ring sections laterally away from and toward each other at certain polnts in the rotary travel of the ring.

3. A briquetting press, comprising a revoluble ring embodying two coordinate annular sections arranged face to face and conjointly providing between the adjacent inner faces of their rim portions an annular compression groove; means for feeding material to the groove; a rotary compressing disc mounted within and eccentrically of said ring and projecting conformably into said groove; and a 'roller engaging the eriphery of the ring and'having a-circum erential collar of wedge-section which is adapted to project between the said adjacent faces of the ring sections to force the latter apart. l

4. A briquetting press, comprising a revoluble ring embodying twocoordinate annular sections arranged face to face and conjointly providing between the adjacent inner faces of their rim portions an annular compression groove; means for feeding material to the groove;: a rotary compressing disc mounted within and eccentrically of said ring and projecting conformably into said groove; and a plurality of guiding and driving rollers engaging the periphery of the ring at different points, fone of said rollers having a circumferential collar of wedgesection which is adapted to project between the said adjacent faces of the ring sections to force the latter apart.

5. A briquetting press, according to claim 4, in which at least one roller consists of two parts which are ad'ustable longitudinally with relation to eac other to compensate for wear-y 6. A briquettin4 press, comprising a rev disc mounted within and eccentrically of said oluble ring embo yin two coordinate anring and projecting conformably into ksaid nular sections arrange face to face and congroove; and a, roller within the-ring located 10 jointly providing between the adjacent inin advance of said' disc for subjecting the 5 ner faces of then' rim portions an annular material to a preliminary compression.

compression groove; means for feeding ma- In testimony whereof I aix my signature.

terial to the groove; a rotary compressing n HUGO APFELBECK. 

